防灾减灾工程学报2017，Vol.37Issue(6)：900-909,10.DOI:10.13409/j.cnki.jdpme.2017.06.007
城市中心地带地铁深基坑开挖对周边环境影响实测分析
Monitoring Analysis of Effects of Subway Deep Excavation on Surroundings in City Heartland
摘要
Abstract
Deep excavation in the city central area,where full of buildings and infrastructures,can cause negative impact even damage to the adjacent foundations and buried pipelines.To deeply investigate the excavation effects on the surroundings,considering the deep excavation of city Square station on Xiamen subway line 1,a large amount of field measurements including horizontal displacement of supporting pile,brace axial force,underground water table,pipeline settlement and bridge pier movement,are analyzed thoroughly and carefully which arrive at some valuable conclusions.The results show that:(1) the supporting pile presents a bulging deflection;(2) the maximum axial force of inner brace appears in the top reinforced concrete ones,while the minimum appears in the bottom ones;(3) the surrounding surface settlement profiles show asymmetrical distribution,with concave type on one side and spandrel type on the other,and the settlements tend to convergence after pouring the bottom plate;(4) the buried pipelines which suffers the greatest impact from the excavation is not the nearest one,but is about the ground settlement profile and the location of the maximum settlement as well as the cross section size,material and stiffness of the pipeline;and (5) the foundations of viaduct pier get little disturbance from the excavation with small settlements.关键词
深基坑/监测/地表沉降/水平位移/轴力Key words
deep excavation/monitoring/surface settlement/horizontal displacement/axial force分类
建筑与水利引用本文复制引用
施有志,李秀芳,林树枝..城市中心地带地铁深基坑开挖对周边环境影响实测分析[J].防灾减灾工程学报,2017,37(6):900-909,10.基金项目
福建省自然科学基金项目(2016J01271)、福建省住房和城乡建设厅科学技术项目(2016-K-26)、福建省建筑产业现代化闽台科技合作基地项目(160050208)、厦门市建设局科技项目(XJK-2017-1-3)资助 （2016J01271）
